Yellow sticky boards: a possible way of monitoring little spruce sawfly (Pristiphora abietina) (Hymenoptera: Tenthredinidae)

Abstract

Several methods of Pristiphora abietina adults catching were compared (Malaise trap, white and yellow sticky boards, sweeping). The yellow sticky boards are handy in the field, and under the high population density appear to be a reliable method of detecting sawfly populations: 1. There was a statistically significant coincidence between the samples of Malaise traps and yellow sticky boards. 2. There was a highly significant linear correlation between the number of caught adults on five sticky boards and the degree of defoliation in seven localities. 3. We did not observe any statistically significant differences between the samples on yellow sticky boards taken in different intervals. To estimate the abundance of adults, it is sufficient to install yellow sticky boards before swarming and check them after the swarming. 4. No statistically significant differences were found between the catch means per board in line with different number of boards, it means with different distance, in both male and females.

Keywords

• pristiphora abietina
• ways of monitoring
• yellow sticky boards
• sweeping
• malaise trap
• evaluation of feeding
• czech republic